Finding the Fourth Proportional to 1,072.58, 1,479.40 and 773.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.58 : 1,479.40 = 773.82 : x
2. Step 2: Convert to fraction form
   1,072.58/1,479.40 = 773.82/x
3. Step 3: Cross multiply
   1,072.58x = 1,479.40 × 773.82
4. Step 4: Simplify right side
   1,072.58x = 1,144,787.37
5. Step 5: Solve for x
   x = 1,144,787.37/1,072.58
6. Step 6: Final answer
   x = 1,067.33